They have come off the field winded, remarking about how hard they have been working. They seem to like it.

"It's a good solid workout," Sandberg said. "I like the fact that there's not a lot of action with guys looking for work afterward because as a group everybody is getting their work in. That says they're getting enough. I think it's a good sign guys aren't looking for extra things to do."

Todd Zolecki is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.